标签: uiactivityindicatorview

如何在UIActivityIndicatorView旋转时禁用所有输入？

谢谢

我使用UIActivityViewController来显示共享.在我选择邮件应用程序的列表中,主题和正文设置正确,Gmail应用程序中的位置为空.

- (void)shareAVideoWithSubject:(NSString*)subject Link:(NSString *)string onViewController:(UIViewController *)viewController fromView:(UIView *)view {

    _activityViewController =
    [[UIActivityViewController alloc] initWithActivityItems:@[string]
                                      applicationActivities:nil];
    _activityViewController.excludedActivityTypes = @[UIActivityTypePrint, UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll, UIActivityTypeAddToReadingList, UIActivityTypeAirDrop];
    [_activityViewController setValue:subject forKey:@"subject"];


    UIWindow *window = [[[UIApplication sharedApplication] delegate]window];

    //if iPhone
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
    {
        if(!viewController){
            viewController = ((SWRevealViewController*)window.rootViewController).presentedViewController;
        }
        [viewController presentViewController:_activityViewController
                                     animated:YES
                                   completion:nil];

    }   
    //if iPad
    else
    {
        // Change Rect to position Popover
        popup = [[UIPopoverController alloc] initWithContentViewController:_activityViewController];
        UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithCustomView:view];
        [popup presentPopoverFromBarButtonItem:barButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    }
}

我在StackOverFlow上查看了以下两个问题.

1. UIActivityViewController没有在gmail中显示正文文本

2. UIActivityViewController没有在gmail中显示正文文本

这些不是我的问题的答案,因为他们在列表中添加了新的活动,而我希望iOS显示所有可共享的应用程序.在这种情况下,Gmail共享正在变空. …

我正在处理以下代码,并尝试在页面加载时在视图中显示活动指示器.

我试图实现WKNavigationDelegate方法,但我失败了,因为没有显示.

对于如何解决这个问题,有任何的建议吗？

我没有在任何地方设置SupportWebView视图委托,但我不知道如何在swift中执行它.

import UIKit
import WebKit

class SupportWebView: UIViewController, WKNavigationDelegate {
    @IBOutlet var containerView : UIView? = nil

    var webView: WKWebView?

    override func loadView() {
        super.loadView()
        self.webView = WKWebView()
        self.view = self.webView
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        var dataManager = DataManager.sharedDataManager()
        var url = dataManager.myValidURL
        var req = NSURLRequest(URL:url!)
        self.webView!.loadRequest(req)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func webView(webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) { …

我想向alertview显示消息:"正在加载数据"和旋转活动指示器.我怎样才能做到这一点？

我有一个包含两个视图的视图.其中一个视图包含两个按钮和一些文本标签.另一个,alpha设置为0.25,有一个UIActivityIndicatorView告诉用户应用程序正在工作,他必须等到它完成.如果用户在UIActivityIndicatorView旋转时触摸按钮,则当UIActivityIndicatorView停止时,应用记住用户操作并响应它.如何丢弃UIActivityIndicatorView正在旋转时发生的用户交互？

谢谢阅读.

PD:就像在这个帖子中评论一样,我更喜欢不使用任何模态解决方案.

编辑:

我目前正在使用此代码,但它无法正常工作.

- (void)viewDidAppear:(BOOL)animated {

  // The view appears with an UIActivityIndicatorView spinning.
  [self showResults]; // The method that takes a long time to finish.
  [self.activityIndicator stopAnimating];
  // When the showResults method ends, the view shows the buttons to the user.
  [self.activityIndicatorView setHidden:YES];
  [self.menuButton setEnabled:YES];
  [self.menuButton setUserInteractionEnabled:YES];
  [self.playButton setEnabled:YES];
  [self.playButton setUserInteractionEnabled:YES];
  [self.view setUserInteractionEnabled:YES];
  [self.interactionView setUserInteractionEnabled:YES];
}

我目前UIAlertController正在屏幕上显示.警报视图应仅显示2个元素,标题和UIActivityIndicatorView警报中心.以下是显示警报及其元素的功能.

func displaySignUpPendingAlert() -> UIAlertController {
        //Create the UIAlertController
        let pending = UIAlertController(title: "Creating New User", message: nil, preferredStyle: .Alert)
        //Create the activity indicator to display in it.
        let indicator = UIActivityIndicatorView(frame: CGRectMake(pending.view.frame.width / 2.0, pending.view.frame.height / 2.0, 20.0, 20.0))
        indicator.center = CGPointMake(pending.view.frame.width / 2.0, pending.view.frame.height / 2.0)
        //Add the activity indicator to the alert's view
        pending.view.addSubview(indicator)
        //Start animating
        indicator.startAnimating()

        self.presentViewController(pending, animated: true, completion: nil)
        return pending
    }

但是,活动指示器不会显示在视图的中心,实际上它显示在屏幕的右下方,远离视图.这是什么原因？

编辑:我知道我可以硬编码指标位置的数字,但我希望警报可以在多个屏幕尺寸和方向的多个设备上工作.

对于Mac OS X,是否有像"UIActivityIndi​​catorView for iOS"的"NSActivityIndi​​catorView"？

如何在长时间的活动中展示旋转的"装备"？

为什么以下代码不能将活动指示器定位到其超级视图的中心:

UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc]
       initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

[self.mysuperview addSubview:activityIndicator];
[activityIndicator addConstraints:[NSLayoutConstraint 
                   constraintsWithVisualFormat:@"|-(>=20)-[view(==100)]-(>=20)-|"
                   options:NSLayoutFormatAlignAllCenterX | NSLayoutFormatAlignAllCenterY
                   metrics:nil
                   views:@{@"view" : self.mysuperview}]];

活动指示器位于左上角的某个位置,绝对不在中心位置.

==================更新:找到解决方案:我必须在创建指标后关闭自动调整约束,然后在给定工作的所有解决方案中关闭:

 [activityIndicator setTranslatesAutoresizingMaskIntoConstraints:NO];

我在@Vignesh给出的链接上找到了它,所以我接受他/她的回答.

在我的应用程序中,我想在UItableview下添加活动指示器,其中tableview将滚动但我不知道如何在那里添加活动指示器.

详细说明,当我将完成tableview的滚动时,为了获得更多数据,我必须通过活动指示器设置刷新选项.

我已经在tableview的顶部尝试了它并且它工作但我不知道如何将它添加到tableview下面.这是一些示例代码..

      - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
if (isLoading) return;
isDragging = YES;


refreshHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0, scrollView.contentOffset.y + REFRESH_HEADER_HEIGHT, 320, REFRESH_HEADER_HEIGHT)];
refreshHeaderView.backgroundColor = [UIColor clearColor];

refreshLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, scrollView.contentOffset.y + REFRESH_HEADER_HEIGHT, 320, REFRESH_HEADER_HEIGHT)];
refreshLabel.backgroundColor = [UIColor clearColor];
refreshLabel.font = [UIFont boldSystemFontOfSize:12.0];
refreshLabel.textAlignment = UITextAlignmentCenter;

refreshArrow = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"refresharrow.png"]];
refreshArrow.frame = CGRectMake((scrollView.contentOffset.y + REFRESH_HEADER_HEIGHT - 27) / 2,
                                (scrollView.contentOffset.y + REFRESH_HEADER_HEIGHT - 44) / 2,
                                27, 44);

refreshSpinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
refreshSpinner.frame = CGRectMake((scrollView.contentOffset.y …

我希望在加载数据时(在另一个线程中)在uitableview上显示活动指示器.所以在UITableViewController的ViewDidLoad方法中:

-(void)viewDidLoad
 {
    [super viewDidLoad];

    //I create the activity indicator
    UIActivityIndicatorView *ac = [[UIActivityIndicatorView alloc]  
                      initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
    [ac startAnimating];

    //Create the queue to download data from internet
    dispatch_queue_t downloadQueue = dispatch_queue_create("PhotoDownload",NULL); 
    dispatch_async(downloadQueue, ^{
      //Download photo
      .......
      .......
      dispatch_async(dispatch_get_main_queue(), ^{
         ......
         ......
         [ac stopAnimating];
      });
    });
   .......

为什么活动指示器不会显示在表格视图上？我怎样才能实现它？